# CVE-2024-10838: Integer Underflow in DDS_Security_Deserialize_ methods may lead to OOB read

> An integer underflow in Eclipse Cyclone DDS allows unauthenticated attackers to read out-of-bounds memory, potentially leaking secrets or causing denial of service.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Mar 2025
- **Updated:** 12 Mar 2025
- **Also known as:** GHSA-6jj6-w25p-jc42, UBUNTU-CVE-2024-10838

## What is CVE-2024-10838?

CVE-2024-10838 is a high-severity vulnerability in Eclipse Cyclone DDS, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An integer underflow during deserialization may allow any unauthenticated user to read out of bounds heap memory. This may result into secret data or pointers revealing the layout of the address space to be included into a deserialized data structure, which may potentially lead to thread crashes or cause denial of service conditions.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2024-10838?

It affects 1 product.


Products: Eclipse Cyclone Data Distribution Service.

## How do I fix CVE-2024-10838?

No fix has been published for CVE-2024-10838 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-10838 being exploited?

There is no known exploitation of CVE-2024-10838 in the wild and no public exploit code.

## Other vulnerabilities in Eclipse Cyclone DDS

- [CVE-2025-67109](https://insights.sbomify.com/CVE-2025-67109/): Security feature bypass in n/a (critical 10.0)
- [CVE-2020-18734](https://insights.sbomify.com/CVE-2020-18734/): Memory corruption in n/a (high 7.5)
- [CVE-2020-18735](https://insights.sbomify.com/CVE-2020-18735/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-10838 and fix it if it is affected.

What it is: CVE-2024-10838 is a high-severity vulnerability in Eclipse Cyclone DDS, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-10838 in the wild and no public exploit code.

Affected product: Eclipse Cyclone DDS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-10838/ (Markdown: https://insights.sbomify.com/CVE-2024-10838/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-10838
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-10838
- OSV: https://osv.dev/vulnerability/CVE-2024-10838

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-10838/
Summaries are generated and may contain mistakes; the official description above is the record.